2 * ============ Hardware Abstraction Layer for MSP-EXP430G2 LaunchPad ============
6 #include "Em_Message.h"
11 /* -------- INTERNAL FEATURES -------- */
13 #define GREEN_LED_CONFIG() (P1DIR |= BIT6)
14 #define GREEN_LED_ON() (P1OUT |= BIT6)
15 #define GREEN_LED_OFF() (P1OUT &= ~BIT6)
16 #define GREEN_LED_READ() (P1OUT & BIT6)
17 #define GREEN_LED_TOGGLE() (P1OUT ^= BIT6)
19 #define RED_LED_CONFIG() (P1DIR |= BIT0)
20 #define RED_LED_ON() (P1OUT |= BIT0)
21 #define RED_LED_OFF() (P1OUT &= ~BIT0)
22 #define RED_LED_READ() (P1OUT & BIT0)
23 #define RED_LED_TOGGLE() (P1OUT ^= BIT0)
25 #define GPIO_CONFIG(mask) (P1DIR &= ~mask, P1REN |= mask, P1OUT |= mask, P1IES |= mask);
26 #define GPIO_ENABLE(mask) (P1IFG &= ~mask, P1IE |= mask)
27 #define GPIO_DISABLE(mask) (P1IE &= ~mask, P1IFG &= ~mask)
28 #define GPIO_FIRED(mask) (P1IFG & mask)
29 #define GPIO_LOW(mask) (!(P1IN & mask))
30 #define GPIO_DEBOUNCE_MSECS 100
32 #define DEBUG1_CONFIG() (P2DIR |= BIT3)
33 #define DEBUG1_ON() (P2OUT |= BIT3)
34 #define DEBUG1_OFF() (P2OUT &= ~BIT3)
36 #define DEBUG2_CONFIG() (P2DIR |= BIT4)
37 #define DEBUG2_ON() (P2OUT |= BIT4)
38 #define DEBUG2_OFF() (P2OUT &= ~BIT4)
40 #define EAP_RX_BUF UCA0RXBUF
41 #define EAP_TX_BUF UCA0TXBUF
43 #define EAP_RX_VECTOR USCIAB0RX_VECTOR
44 #define EAP_TX_VECTOR USCIAB0TX_VECTOR
45 #define EAP_TX_ACK_VECTOR PORT2_VECTOR
47 #define EAP_RX_ENABLE() (P1SEL |= BIT1, P1SEL2 |= BIT1)
48 #define EAP_RX_DISABLE() (P1SEL &= ~BIT1, P1SEL2 &= ~BIT1)
49 #define EAP_TX_ENABLE() (P1SEL |= BIT2, P1SEL2 |= BIT2)
50 #define EAP_TX_DISABLE() (P1SEL &= ~BIT2, P1SEL2 &= ~BIT2)
52 #define EAP_RX_ACK_CONFIG() (P2DIR |= BIT0)
53 #define EAP_RX_ACK_SET() (P2OUT |= BIT0)
54 #define EAP_RX_ACK_CLR() (P2OUT &= ~BIT0)
56 #define EAP_TX_ACK_CONFIG() (P2DIR &= ~BIT1, P2IES |= BIT1, P2IFG &= ~BIT1, P2IE |= BIT1)
57 #define EAP_TX_ACK_TST() (P2IFG & BIT1)
58 #define EAP_TX_ACK_CLR() (P2IFG &= ~BIT1)
60 #define EAP_RX_INT_CLR() (IFG2 &= ~UCA0RXIFG)
61 #define EAP_RX_INT_ENABLE() (IE2 |= UCA0RXIE)
62 #define EAP_TX_INT_CLR() (IFG2 &= ~UCA0TXIFG)
63 #define EAP_TX_INT_DISABLE() (IE2 &= ~UCA0TXIE)
64 #define EAP_TX_INT_ENABLE() (IE2 |= UCA0TXIE)
66 #define MCLK_TICKS_PER_MS 1000L
67 #define ACLK_TICKS_PER_SECOND 12000L
68 #define UART_WATCHDOG_PERIOD (ACLK_TICKS_PER_SECOND * 250) / 1000
70 #define UART_WATCH_DISABLE() (TA1CCTL1 = 0) // Turn off CCR1 Interrupt
71 #define UART_WATCH_ENABLE() (TA1CCR1 = TA1R + UART_WATCHDOG_PERIOD, TA1CCTL1 = CCIE) // Set CCR1, and Enable CCR1 Interrupt
74 #define DINT() __disable_interrupt()
75 #define EINT() __enable_interrupt()
77 #define SLEEP() _BIS_SR(LPM3_bits + GIE)
78 #define WAKEUP() _BIC_SR_IRQ(LPM3_bits)
81 #ifdef __TI_COMPILER_VERSION__
82 #define DINT() (_disable_interrupt())
83 #define EINT() (_enable_interrupt())
84 #define INTERRUPT interrupt
85 #define SLEEP() (__bis_SR_register(LPM3_bits + GIE))
86 #define WAKEUP() (__bic_SR_register_on_exit(LPM3_bits))
89 #define NUM_HANDLERS 5
91 #define EVENT3_HANDLER_ID 0
92 #define EVENT4_HANDLER_ID 1
93 #define EVENT5_HANDLER_ID 2
94 #define TICK_HANDLER_ID 3
95 #define DISPATCH_HANDLER_ID 4
97 static void gpioHandler(uint8_t id);
98 static void postEvent(uint8_t handlerId);
100 static Hal_Handler appGpioHandler;
101 static volatile uint16_t handlerEvents = 0;
102 static uint16_t clockTick = 0;
103 static Hal_Handler handlerTab[NUM_HANDLERS];
106 /* -------- APP-HAL INTERFACE -------- */
108 void Hal_gpioEnable(Hal_Handler handler) {
112 for (id = 0, mask = BIT3; id < 3; id++, mask <<= 1) {
113 handlerTab[id] = gpioHandler;
114 appGpioHandler = handler;
115 (P1DIR &= ~mask, P1REN |= mask, P1OUT |= mask, P1IES |= mask);
117 (P1IFG &= ~mask, P1IE |= mask);
121 void Hal_connected(void) {
124 void Hal_debugOn(uint8_t line) {
134 void Hal_debugOff(uint8_t line) {
144 void Hal_debugPulse(uint8_t line) {
156 void Hal_delay(uint16_t msecs) {
158 __delay_cycles(MCLK_TICKS_PER_MS);
162 void Hal_disconnected(void) {
165 void Hal_init(void) {
169 WDTCTL = WDTPW + WDTHOLD;
170 BCSCTL2 = SELM_0 + DIVM_0 + DIVS_0;
171 if (CALBC1_1MHZ != 0xFF) {
173 BCSCTL1 = CALBC1_1MHZ; /* Set DCO to 1MHz */
174 DCOCTL = CALDCO_1MHZ;
176 BCSCTL1 |= XT2OFF + DIVA_0;
177 BCSCTL3 = XT2S_0 + LFXT1S_2 + XCAP_1;
186 /* setup debug pins */
188 DEBUG1_CONFIG(); DEBUG1_OFF();
189 DEBUG2_CONFIG(); DEBUG2_OFF();
191 DEBUG1_ON(); DEBUG1_OFF();
194 TA1CTL = TASSEL_1 + MC_2; // ACLK, Continuous mode
195 UART_WATCH_DISABLE();
212 UCA0CTL1 = UCSSEL_2 + UCSWRST;
213 UCA0MCTL = UCBRF_0 + UCBRS_6;
215 UCA0CTL1 &= ~UCSWRST;
217 handlerTab[DISPATCH_HANDLER_ID] = Em_Message_dispatch;
220 void Hal_idleLoop(void) {
225 // atomically read/clear all handlerEvents
227 uint16_t events = handlerEvents;
230 if (events) { // dispatch all current events
234 for (id = 0, mask = 0x1; id < NUM_HANDLERS; id++, mask <<= 1) {
235 if ((events & mask) && handlerTab[id]) {
240 else { // await more events
246 void Hal_greenLedOn(void) {
250 void Hal_greenLedOff(void) {
254 bool Hal_greenLedRead(void) {
255 return GREEN_LED_READ();
258 void Hal_greenLedToggle(void) {
262 void Hal_redLedOn(void) {
266 void Hal_redLedOff(void) {
270 bool Hal_redLedRead(void) {
271 return RED_LED_READ();
274 void Hal_redLedToggle(void) {
278 void Hal_tickStart(uint16_t msecs, Hal_Handler handler) {
279 handlerTab[TICK_HANDLER_ID] = handler;
280 clockTick = (ACLK_TICKS_PER_SECOND * msecs) / 1000;
281 TA1CCR0 = TA1R + clockTick; // Set the CCR0 interrupt for msecs from now.
282 TA1CCTL0 = CCIE; // Enable the CCR0 interrupt
285 void Hal_tickStop(void) {
286 handlerTab[TICK_HANDLER_ID] = 0;
291 /* -------- SRT-HAL INTERFACE -------- */
293 uint8_t Em_Hal_lock(void) {
294 uint8_t key = _get_interrupt_state();
296 __disable_interrupt();
298 #ifdef __TI_COMPILER_VERSION__
299 _disable_interrupt();
304 void Em_Hal_reset(void) {
305 uint8_t key = Em_Hal_lock();
306 EAP_RX_ACK_CLR(); // suspend the MCM
308 EAP_RX_ACK_SET(); // reset the MCM
317 void Em_Hal_startSend() {
318 EAP_TX_BUF = Em_Message_startTx();
321 void Em_Hal_unlock(uint8_t key) {
322 _set_interrupt_state(key);
325 void Em_Hal_watchOff(void) {
326 UART_WATCH_DISABLE();
329 void Em_Hal_watchOn(void) {
334 /* -------- INTERNAL FUNCTIONS -------- */
336 static void gpioHandler(uint8_t id) {
337 uint16_t mask = BIT3 << id;
339 Hal_delay(GPIO_DEBOUNCE_MSECS);
340 if (GPIO_LOW(mask) && appGpioHandler)
345 static void postEvent(uint8_t handlerId) {
346 uint8_t key = Em_Hal_lock();
347 handlerEvents |= 1 << handlerId;
351 /* -------- INTERRUPT SERVICE ROUTINES -------- */
354 __attribute__((interrupt(PORT1_VECTOR)))
356 #ifdef __TI_COMPILER_VERSION__
357 #pragma vector=PORT1_VECTOR
359 INTERRUPT void gpioIsr(void) {
363 for (id = 0, mask = BIT3; id < 3; id++, mask <<= 1)
364 if (GPIO_FIRED(mask)) {
372 __attribute__((interrupt(EAP_RX_VECTOR)))
374 #ifdef __TI_COMPILER_VERSION__
375 #pragma vector=EAP_RX_VECTOR
377 INTERRUPT void rxIsr(void) {
378 uint8_t b = EAP_RX_BUF;
379 Em_Message_startRx();
382 if (Em_Message_addByte(b)) {
383 postEvent(DISPATCH_HANDLER_ID);
389 __attribute__((interrupt(TIMER1_A0_VECTOR)))
391 #ifdef __TI_COMPILER_VERSION__
392 #pragma vector=TIMER1_A0_VECTOR
394 INTERRUPT void timerIsr(void) {
395 TA1CCR0 += clockTick;
396 postEvent(TICK_HANDLER_ID);
401 __attribute__((interrupt(EAP_TX_ACK_VECTOR)))
403 #ifdef __TI_COMPILER_VERSION__
404 #pragma vector=EAP_TX_ACK_VECTOR
406 INTERRUPT void txAckIsr(void) {
407 if (EAP_TX_ACK_TST()) {
409 if (Em_Message_getByte(&b)) {
418 __attribute__((interrupt(TIMER1_A1_VECTOR)))
420 #ifdef __TI_COMPILER_VERSION__
421 #pragma vector=TIMER1_A1_VECTOR
423 INTERRUPT void uartWatchdogIsr(void) {
426 UART_WATCH_DISABLE();
427 Em_Message_restart();